Obsidian Proto-Whelp
Source: Vendor. After finding a clutch of black proto-whelps, Wrathion took them under his wing. Dragonkin type. It's nice when the price is listed along with the pet. To that end, this cost is: 3 x Primal Bear Spine 1 x Large Sturdy Femur 100 x Dragon Isles Supplies
The 
Obsidian Proto-Whelp is a pet vendor reward that requires reaching Ally rank (level 3 of 6) with Wrathion.
Guide awaiting review
Build Wrathion Reputation
Complete the quest Allegiance to Wrathion to begin earning reputation with him. Farm reputation by defeating enemies at 28.3, 58.8 in the basement area, then continue grinding reputation tasks until you reach Ally status (level 3 of 6).
Purchase Pet from Vendor
Visit the Wrathion vendor and purchase the Obsidian Proto-Whelp once you have achieved Ally rank with Wrathion.
Tips
See the video guides for detailed NPC locations, rare spawns, and farm routes.
